Sewing machine



March 21, 1933- F. MOREL SEWING MACHINE Filed July 20, 1926 4 Sheets-Sheet l March 21, 1933. F. MOREL SEWING MACHINE Filed July 20 4 Shets-Sheet 2 March 21, 1933.

F. MOREL SEWING MACHINE Filed July 20. 1926 4 Sheets-Sheet 3 March 21, 1933. F. MOREL SEWING MACHINE Filed July 20 1926 4 Sheets-Sheet 4 Patented Mar. 21, 1933 uNiTEofs TEs {PAT ENT OFFICE ironnfg'or raynryms, ran RAZAo-sURqms n, FRANCE, ASSIGNOR-TO ANCIENS j"mantissmmm'rs n. CORNELY & .CIE (SOO'IETE ANONYME), or rams, FRANCE s me nnonmn Application. filed July 20, 1926,-Seria1 No. 123,759, and inFrance man 23, 1926.

Inamy prior patentapplication Serial No. 698,800 filed March 12, 1924, I described a'device for the direct and separate 'controlof the movement'- of oscillation ofieach-of the needles by means of elements which rotate exclusiveg.

1y. about their axes, through the medium of a. single initial cam anda single connect ng rod,- in 1 order to imp art themotion to the; osc1llating systemiitself; 1 h if The said mechanism was'defective from the fact that oscillations of the connecting rod did not take place in the'vertical plane, since they made a-certain angle with the plane of oscillation of the elements controlling the needle-carriers.- I

Further, the joints at the ends :of the connecting rod consisted of ball-and-soc'ket joints which were difficult to manufacture jandrequired an accurate adjustment,-and whereof the wear-could not be taken up.- :The forward movements of he needles couldon-ly'bemade exactly equal properly proportioning the distance between their attaching points and their centres of oscillation, toithe lengths of their controlling rods, and this proved somewhat difficult to carry out in practice. p

In the improved controlling mechanism, the object of the present invention, all such disadvantages are obviated. In this device, the position of the connecting rod controlling the needles is changed, so that the rod will always oscillate in the vertical plane, and this allows the said rod to be mounted at each end by a cylindrical pivot oint which is easy to manufacture and to adjust.

.Fig. 1 is a fragmentary side elevational view of the right end of my apparatus.

Fig. 2 is a view similar to Fig. 1 of the left end of my; apparatus.

Fig. 3 is a detail view. of the mechanism controlling the needles.

Fig. 4; is a side elevation of the said mechanism. V

Fig. 5 is a horizontal section on the line 5'5 of Fig. 4. I

' Fig. 6. is a plan view, on a larger scale, of an arrangement for regulating the amplitude ofthe oscillation.

. Figs. -7 and 8 show two'other embodiments ofthe invention respectively.

The main-:shaft 1 of the machine, Fig. 1, communicates its movement-of rotation, through the medium of'the gear-wheels 2 and 3, tothe'cam 4-which rotates upon the inter-i mediate'shaft'5: I w

The cam 4 (Fig. l) imparts to the connectin'g rod: 9, bymeans of the two levers 6 and 7, and the link 8,"the movements necessary for the oscillation of the needles; I

-rThe= connecting rod 9 is rigidly connected withthe sleeve 10 (Figs. 2'and 5), and it'is guided in a cylindrical bearing 19 having the axis y y,-so'as to allow it to assume sliding and rotary movements which are imparted to the-shaft 20 by which the connecting rod 9 transmits its motion, due to the cam 1, to the links 12 and 13 which'are also pivoted to the shaft 20-.

- The two links 12 and 13 are further pivoted-to two-.levers 14 and 15 carrying at their ends the tworespective pivoted bearings cand din which are slidable the rods 16 and 17 forming a lever pivoting on the studs 0 and 0 for the oscillation of the needles f-andf.

The said studs 0 and 0 are fastened to the same support which is secured to the main needle-carrier 18 of the machine and which possesses, as in all sewing machines, a reciprocating motion in the vertical direction; the rods 16 and 17 which are actuated by the needle-carrier 18, slide in the bearings 0 and d of the levers 14 and 15.

The lever 14; is pivoted to a cylindrical stud e which is mounted on a boss formed on the cast iron head of the machine (Fig. 1). The stud e is hollow, in order thatthe lever 15 may in all cases pivot on the axis of the lever 14, so that these two levers will have the same pivoting axis. Any other suitable arrangement may be adopted for the axes of the levers 14 and 15, and these might be placed in line with one another. v

It is observed that when the connecting rod 9 is given a horizontal reciprocating motion by the action of the cam 4: and the levers 6 and 7, the jointed parallelogram consistingof the links 12 and 18, the lever 15, and the upper part of the lever 1e, will open or close according to the movements of the connecting rod 9, so that the ends of the levers 13 andl l will move from or towards the axis of the needle-carrier 18; for this reason the rods 16 and 17, due to the bearings c and rt, will impart to the-needles the correspdnding movement of oscillation.

Fig. 6 shows a detail of the arrangement employed to "regents the 6f Inc tion of -the "connecting rod 9,- and' therefore of the oscillation. U

The lever 6 (Fig. l) carries a roller which is rotatable on thestud k engages a suitable groove, formed on the cam '4; the link 8 connects together the levers 6 and 7, which are pivoted to the respective studs n and p. Upon: the lever 7. is mounted the circular sector 1' provided with-aslot sin which-the end of the link 8 may be dis'-' placed and secured-by means of. astud t having a screw-threaded end engaged by. a nut-t; i

f'It will be readily. understood that the stroke-of the connecting rod-'9 .and' hence the oscillation of the needleswill be increased 'or diminished according to the position of. the end-of, the link-8qupon the sector 1' of .the lever 7. Figs. 7 and 8, show two other arrangements for the obtainment of the movement of the needles, while -maintaining thesame prin ipl 34.

In both cases, the studs 6 e e..are secured j to bosses formed on the cast iron headiofthe machine.- The connecting'rod.9 .(Fig. as inthe preceding description, imparts-to the lever-M a movement of rotation about e'.; The lever K is actuated by an extended. part 9 of the rod 9, the lever Land the link P. This separates or brings togetherv the bearings c and d which are secured tothe levers M and K, and hence imparts to the levers 16' and 17 a suitable movement, as above described.

Fig. 8 is a modified form ofthe preceding figure. a

In this embodiment the levers K, L and link P are arranged as before. The extension 9 has been eliminated, however, from rod 9 which is directly connected to lever L. The pivot stud c has been moved to the opposite end of lever M which is connected to the lever L through a link P similar to the link P.

Obviously, modifications in detailmay be made in the constructional forms above de-' scribed without departing from the principle of the invention.

lVhat I claim is:

1, In a sewing machine of the type described having a main operating shaft and an operating cam driven thereby, the combination of a pivoted lever reciprocatedlby' said cam, a second pivotedglever parallelly di'sposed to said first mentioned lever, a link pivotally connecting the free ends of said levers, means for changing one of the pivot points of said link, a pair of needle oscillating rods and a toggle mechanism operatively connected to said-secondlever slidingly en-' gaging said'needle oscillating rods;

2 In a sewing machine of the type de ribe having a mai erem ag. hefte e el c in 9am fite fth e i ze nation of a pivoted leverh'eiprbcated by'said cam, a second ivoted lever parallelly dispbsed 'to'said rst mentioned lever, a link p retel r eeewfieatha end of said evers, means for changing one 'o the pivot points ofsaidjli-nk, a needle scillating-rod connected-atone extremity'to the 'free end as said second lever whereby: the oscillating movement of said rod may be varied'at will,- a pair of needle rods pivotally niountedad jacent the other extremity ofsaidlrodand a toggle' mechanismfassociatedwith said other extremity of said rod adapted to transmit the motion thereof to said needle rods andytoi cause said needle rods to move to j'and -from each other. 2 3. In a'sewing machine otthe .type. described having 'a-in'ain operating shaft and. an operating cam driven thereby, tli'ecombination of a pivoted lever reciprocated by. said.- cam, a second pivoted-leverparallelly disposed to said! fiistmehtioned. lever, a link pivotally. connecting the 'fre ends of said levers, meansvfor changing one of the pivot points of said.link,with 0utdisplacing either of'said levers, a pair of;needle.-oscillat'i'ng rods, and, .a' to gle mechanism operatively: connected to said'second, lever, slidably en gaging said, needle oscillating rods.

4. In a sewing machine of the typedescribed, a main operating" shaft. and: an operating cam driven thereby, the combination of a' pivoted lever reciprocated by said cam, a second pivoted lever parallel to said first mentioned lever, a link. for pivotallyIcon'jnecting the free endsof said levers, anarcht t a ne fi d evers, u fp vota y connectedto saidlink, and a projection, on said said; adapted to slidablypengage slot, Iiieans'ior, fixing said projection in a given position'in said s1ot,a pair otneedle oscillatingrods and a toggle mechanism 0 5- eratively connected I to said second lever slidably engaging said he'edle scillating rods.

5. A sewing machine according to claim/l: in which said arcuate slotiisff rqvid'ed along its edgeswith overhanging anges embrae ing the projection otsaidfs tud'.

6.'In a sewing m'a'chifie of the type described a plurality of pivotally mounted iiee dle bars, a'needle oscillating crossbar, a" "p'ivoted lever parallelogram pivotedf to said crossbar and slidably connected to one of-s'aid needle bars at. the common "pivotpoi'nt of two of the levers of said parallelogram and an extension on one of the levers of said parallelogram slidably engaging the other of said needle bars for the pur ose described.

7. In a sewing machine 0 the type described a plurality of pivotally mounted needle bars, a needle oscillating crossbar, a pivoted lever parallelogram pivoted to said crossbar and slidably connected to one of said needle bars at the common pivot point of two of the levers of said parallelogram, an extension on one of the levers of said parallelogram slidably engaging the other of said needle bars and a pivotally mounted cylinder for slidably supporting said needle oscillating crossbar.

8. In a sewing machine of the type described a plurality of pivotally mounted needle bars, a needle oscillating crossbar, a pivoted lever parallelogram pivoted to said cross-bar and slidably connected to one of said needle bars at the common pivot point of two of the levers of said parallelogram, and means projecting from one of the levers of said parallelogram slidably engaging the other of said needle bars for the purpose described.

9. In a sewing machine of the type described a plurality of pivotally mounted needle bars, a needle oscillating crossbar, a lever slidably engaging one of said needle bars at its extremity, a second lever pivoted at one extremity to the mid-point of said first lever, slidably engaging the other needle bar at its free extremity, a third lever of the same length as said second lever pivoted at one extremity to the free end of said first lever and at the other extremity to said cross bar, and a link interconnecting the extremities of said second and third levers remote from said first lever for the purpose described.

10. In a sewing machine of the type described a plurality of pivotally mounted needle bars, a needle oscillating crossbar, a pivoted lever parallelogram pivoted to said crossbar and slidably connected to one of said needle bars at the common pivot point of two of the levers of said parallelogram, an extension on one of the levers of said parallelogram slidably engaging the'other of said needle bars and pivotally mounted means for slidably supporting said needle oscillating crossbar.

In testimony whereof I have signed this specification.

FELIX MOREL. 

